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Basic Reading Computed Tomography (CT) of BrainBasic Reading Computed Tomography (CT) of Brain
By…Ext.วรปร�ชญ์� สามารถBy…Ext.วรปร�ชญ์� สามารถ
Systemic Approach to Head CT InterpretationSystemic Approach to Head CT Interpretation
• Symmetry – Compare left and right side of the cranium
• Midline – Look for midline shift
• Cross-sectional anatomy – Review anatomical landmark for each slide– Brain tissue : gray matter, white matter , intracerebral lesions– CSF space : ventricle, basal cistern, cortical sulci, fissure– Skull and soft tissue : scalp swelling, fractures, sinuses, orbit
• Subdural windows : Look for blood collection adjacent to the skull
• Bone windows : Skull, orbit and sinuses, intracranial air
Lateral View of BrainLateral View of Brain
Ventricular SystemVentricular System
Cross-sectional AnatomyCross-sectional Anatomy
• Grey/White interface, Subcortical white matter
Cross-sectional AnatomyCross-sectional Anatomy
• Paired of crescent-shape = Twin bananas
Cross-sectional AnatomyCross-sectional Anatomy
Basal gangliaBasal ganglia
Cross-sectional AnatomyCross-sectional Anatomy
• Third ventricle, Basal ganglia, Superior cerebellar cistern
HydrocephalousHydrocephalous
Physiologic CalcificationPhysiologic Calcification
Brain AnatomyBrain Anatomy
Cross-sectional AnatomyCross-sectional Anatomy
• Third ventricle, Smiley face
Cross-sectional AnatomyCross-sectional Anatomy
• Midbrain, Interpeduncular cistern
Cross-sectional AnatomyCross-sectional Anatomy
• Star shape ~ Circle of Willis, • Fourth ventricle, Temporal horn ~ slit
Subarachnoid hemorrhageSubarachnoid hemorrhage
Cross-sectional AnatomyCross-sectional Anatomy
• Base of skull, Midline bony prominence, • Prepontine cistern, Pretrous bone, Frontal sinus
Cross-sectional AnatomyCross-sectional Anatomy
• Orbits, Ethmoid air cell
The End…The End…